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E. D. MACKINTOSH.

CENTHIFUGAL MACHINE.

APPLICATION FILED OCT- 30, I918.

Patented Nov. 11, 1919.

INVENTOH NITED STATES PATENT OFFICE.

EDWARD D. MACKINTOSH, OF BROOKLYN, NEW YORK, ASSIGNOR TO S. S. HEPWORT'HCOMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK, AND EDITH M.MACKINTOSH, OF BROOKLYN, NEW YORK.

CENTRIFUGAL MACHINE.

memes.

Specification of Letters Patent.

Patented Nov. 11, 1919.

Application filed October 30, 1918. Serial No. 260,266.

To all whom it may concern:

Be it known that L EDWARD D. MAGKIN- TOSH, a citizen of the UnitedStates, residing at Brooklyn, in the county of Kings and the State ofNew York, have invented a new and useful Improvement in CentrifugalMachines, of which the following is a specification.

The object of my invention is the automatic discharge, from the basketof a centrifugal machine, of the material treated thereln. I

Referring to the accompanying drawings, forming part of thisspecification:

Figure l is a vertical section of the basket of a centrifugal machineembodying my improvement.

Figs. 2 and 3 are detached views of details.

The top a; and the cylindrical wall I), of the basket, are of a verycommon construc tion but the bottom consists of the frustum of a hollowcone 0 secured to a flange d. This flange has a sleeve 6 sliding axiallyon a hub f carried by the usual spindle g. A feather it, let into thehub, extends into a spline i in the sleeve and prevents it from turningon the hub.

On the bottom of the hub is a head 7' connected to and supporting thebasket wall by means of a series of yokes is and a ring Z.

Ears m and n, forming parts of the flange d and the head j, areconnected by means of a series of toggles pivoted to them, these togglesconsistlng of levers o and p pivoted together at g.

Springs 1* tend'to open the toggles and lift the basket bottom. They aremeant to be of just about sufficient strength to lift it to its highestposition but, when the basket is rotating, its bottom is also held up inits highest position by the action of centrifugal force on the toggles.This tends very strongly, at the high speed employed in the operation ofa centrifugal machine, to force them outwardly, away from the center ofthe basket.

A cloth frustum of a cone, 8, secured to the flange and the head, formsa chamber inclosing the toggles and prevents them from agitating thesurrounding air.

To the top of the hub f is secured a disk 6, and an annular disk u issecured to the lower part of the basket and projects over the gutter 4)commonly forming part of a centrifugal machine.

In operation the material to be treated is dropped on the disk t whileit is rotating at a high speed. The disk throws it against the wall 6 onwhich it collects to a considerable thickness that is quite uniform.When the treatment of the material is finished the basket is stopped andthe treated material, resting on the conical part c, of the bottom,forces 'it down. and drops out. The basket is then rotated again, thetoggles force the basket bottom up to its highest position, and theentire operation is repeated again and again.

I claim:

1. Acentrifugal basket having an axially movable bottom, a head belowthe bottom, fixed to the spindle of the centrifugal, and

' carrying the wall of the basket, and a series of toggles connectingthe head and the bot tom, extending inwardly therefrom toward the centerof the basket, and supporting the bottom.

2. A centrifugal basket having an axially movable bottom, a head belowthe bottom, fixed to the spindle of the centrlfugal and carrying thewall of the basket, a series of toggles connecting the head and thebottom, extending inwardly therefrom toward the center of the basket,and supporting the bottom, and springs tending to open the toggles andlift the bottom.

EDWARD D. MACKINTOSH.

